Oral Cavity Flashcards
Foramen Caecum
Pit in middle of Sulcus Terminalis
*Site of the invagination of the thyroid gland
Sulcus Terminalis
V- shaped groove dividing tongue into anterior 2/3 (Somatic sensory) and posterior 1/3 (visceral sensory)
Lingual Frenulum
Medial fold on the floor of the tongue and mouth
*Swelling @ bottom = Sublingual papilla
Fimbriated Folds
Folds lateral to the lingual frenulum that contain the lingual veins
Lymphatics of Tongue
Tip of tongue => Submental nodes
Anterior 2/3 => Submandibular and Deep cervical nodes
Posterior 1/3 => Deep cervical
*Lymphatics cross midl-line of tongue => possible spread of infxn
Lingual Nerve
Courses medial to the mouth and enters the floor of the mandible
=>courses on hyoglossus muscle and terminates on the dorsum of the tongue
Provides touch, pain to anterior 2/3 of tongue
Glossopharyngeal Nerve
Passes thru jugular foramen and in b/w gap of superior and inferior pharyngeal constrictor muscles
- Passes deep to palatine tonsils and enters posterior tongue
- Visceral sensation, taste to posterior 1/3 of tongue
Hypoglossal Nerve
Out of hypoglossal canal and b/w internal jugular and carotid arteries
- courses on hyoglossus muscle where it eventually enters the tongue
- Just inferior to the Lingual nerve
Tonsillectomy complications
*Bleeding of the tonsillar branches of the palatine artery & possible damage of IX
Glandular Arteries
Branches of the facial artery that supply the submandibular and sublingual glands
Submental Artery
Branch of the facial artery that supplies the chin
Structures b/w Superior Constrictor and Skull (1)
Auditory Canal
Levator palati superioris
Structures b/w Superior Constrictor and Middle Constrictor (2)
Stylopharyngeus
Glossopharyngeal Nerve
Course along w/ each other
Structures b/w Middle Constrictor and Inferior Constrictor
Superior Laryngeal artery
Internal Laryngeal Nerve
Dorsal lingual arteries
Suppy the intrinsic and extrinsic muscles of the tongue
